Heavy-duty Dormer A777 cobalt jobber bit (3.80mm) for tough materials. 135° split point, aerospace-grade.
The Dormer A777 Metric Cobalt Jobber Drill Bit is engineered for heavy-duty applications where high heat is generated during drilling operations. Featuring a robust 135° split point, this bit is specifically designed for drilling tough, high-tensile materials, making it particularly suited for aerospace industry applications.
Constructed from HSCo Cobalt steel, this drill bit offers exceptional durability and heat resistance. The standard helix, right-hand spiral, and thick web flute geometry ensure efficient chip removal and reduced friction. The bronze surface treatment enhances corrosion resistance, prolonging the tool's lifespan.
Point Angle Specifications
Compliant with DIN 338 RN / BS328 / ISO 235 standards, this drill bit guarantees precision and reliability. Its compact dimensions and optimised geometry make it ideal for professional workshops and industrial applications alike.
Free standard delivery on US mainland orders. Express delivery options and international shipping available at checkout.
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